Vertically positioned cooling water pump for internal-combustion engines



PUMP

Dec. 2, 1952 J. cAssA VERTICALLY POSITIONED COOLING WATER FOR INTERNAL-COMBUSTION ENGINES 2 SHEETSSHEET 1 Filed June 18, 1948 INVENTOR. J Cassa Dec. 2, 1952 2,619,909

J. cAssA VERTICALLY POSITIONED COOLING WATER PUMP FOR INTERNAL-COMBUSTION ENGINES Filed June 18, 1948 2 SHEETS-Sl-IEET 2 INVENTOR. /6 J Cass? Patented Dec. 2, 1952 VE RTICALLY POSITIONED COOLING WATER PUMP FOR INTERNAL-COMBUSTION EN- 'GINES J os Cassa, Buenos Ail'ES, Argentina Application J une 18, 1948, Serial No. 33,763

This invention relates to a cooling water pump for internal combustion engines, particularly of the type used for motor vehicle propulsion.

The centrifugal pumps for circulating the water through the cooling systems of engines used for motor vehicle propulsion as heretofore known have been constructed with the rotating pump shaft in the horizontal position. With such construction it has been necessary to provide the shaft with special liquid pressure resisting packings in order to prevent both the leakage of the cooling water from the pump and, conversely, leakage of the lubricating oil for the pump into the cooling water by which it would be carried inside the engine cooling system.

It is well known that such pressure resisting packings impose a frictional drag on the centrifugal pump shaft which consumes part of the energy produced by the engine.

It is further well known that thelubricating oil, if it becomes mixed with the engine cooling water, has a deleterious eliect upon the latter.

The object of the present invention is to provide a cooling water 'pump which will be free of the above described disadvantages. 7

Another object of the present invention is to provide a cooling water pump with the pump shaft mounted vertically and with'the upper end of the pump positioned above the level of the cooling water in the engine cooling system.

A further object of the invention is to provide a cooling water pump in which the possibility of leakage of the cooling water therefrom is at a minimum. v

A still further object of the invention is to provide a cooling water pump in which thpossibility of the lubricating oil for the pump flowing into the cooling water passing therethrough is likewise at a minimum.

An additional object of the invention is to providesa'cooling water pump in which the'use of liquid pressure resisting packings is avoided.

Stillotherobject s, advantages and improvements will become apparent from the following.

specification, taken in connection with the ac companying drawings.

The invention consists essentially in that a centrifugal pump is located outside of the engine and has its shaft positioned vertically with an impeller located adjacent the lower end of the shaft, with the driving connection between the shaft and the impeller being at the upper end of the former andsuch driving connection being at a level above the level of the cooling water else- 4. Claims. (01. 103-103) where in the engine cooling system, particularly in the cylinder head.

Referring now to the drawings in detail, wherein a preferred embodiment of the invention is shown, and wherein the conventional engine parts are shown in dotted lines and parts comprising the cooling water pump according to the present invention in full lines:

Figure 1 is a vertical sectional view through the cooling water pump according to the present invention;

Figure 2 is a top plan view of the cooling water pump of Figure 1, showing in particular the attachment flange for securing same to the cylinder head of the engine;

Figure 3 is a sectional view on the section line 3-3 of Figure 1, showing the connecting of the cooling water pump to the engine cylinder head; and,

Figure 4 is a side elevation view showing an internal combustion engine with the cooling water pump according to the present invention in position thereon.

Referring now to the drawings in detail, and to Figure 4 in particular, there is here shown in outline an internal combustion engine of the type used for the propulsion of motor vehicles comprised principally by a cylinder block I!) and a cylinder head I I. It will be understood that the cylinder head and block are of the conventional water jacketed construction. A radiator I3 is mounted forwardly of the engine on the chassis (not shown). The radiator I3 is connected at its top to the cylinder head I I by an upper pipe and hose connection I4 and at its bottom to the cylinder block III by a lower pipe and hose connection I5. An engine driven fan I6 draws the ambient air in through the radiator I3 to enhance the cooling action. Continuous circulation of the cooling water takes place by thermosiphon action through the cylinder block I0, upper pipe and hose connection I4, radiator I3, and low-er pipe and hose connection I5, The vertically mounted centrifugal pump according to the present invention assists and accelerates this circulation of the water. K v

The pump is in part enclosed within a generally cylindrical casing I! having a bottom I8, an internal concentrically positioned flange 23, slightly below its mid-height, and a second inturned flange 25 at the top. The bottom I8 has an integral frusto-conical boss I9 formed therein. The internal flange 23 partially separates the interior of the casing II into a lower or outlet chamber 2! and an upper or pumping chamber 24. A vertically positioned integral flange 28 is formed on the cylindrical casing l7 and this flange is provided with holes 27 through which bolts (not shown) are inserted to secure the pump to the cylinder head ll. Through the flange there extends a bore 22 which registers with an outlet port [2 in the cylinder head H when the pump is secured to the latter. The upper or pumping chamber 24 communicates through a tubular outlet 28 with the upper pipe and hose connection [4.

An integrally formed elongated upwardly extending boss 29 is formed on the bottom [8 of the cylindrical casing l1 and has a bore tiii therethrough. Within the bore 30 a shaft 4! is journalled and this shaft has at its lower end a tongue 42 for driving connection with any suitable rotating part of the engine.

Adjacent the upper end of the elongated boss 29 there is formed internally of the latter a packing gland recess 32 in which a suitable packing 33 is inserted, this packing rotatably receiving the shaft 4|. At spaced intervals along the bore 36 within the elongated boss 29 there are formed recesses 34 which are preferably semi-circular in cross section, the lowermost of these recesses being approximately at the level of the upper inturned flange 25. The recesses 34 are connected, and the uppermost recess 34 is connected to the packing gland recess 32, by suitable channels 35 which are arranged in zigzag relationship along the bore 36 within the elongated boss 29. A bore 36 extends downwardly from the lowermost recess 34 through the up wardly positioned boss 29 and the frusto-conical boss [9 on the bottom I8 of the cylindrical casing and at its lower end receives a tubular connection 31, to which an oil conduit 40 is connected. This oil conduit is connected to the pressure oil lubrieating system for the engine.

It will be apparent that oil supplied under pressure by the conduit 40 will be forced through the bore 35, recess 34 and successively through the channels 35 and upper recesses 34 to the packing gland recess 32, thus lubricating the shaft 4| throughout its length.

A rotatable tubular sleeve 44 is concentrically positioned in inverted relationship with respect to the upwardly extending boss 29 and spaced radially outwardly therefrom. The bottom 43 of this tubular sleeve bears on the top of the boss 29 and is drivably secured to the top of the shaft 4! as by screws or welding (not shown). At its lower end this tubular sleeve carries paddles or vanes 45.

A tubular casing 49 is concentrically positioned in inverted relationship with respect to the tubular sleeve 44 and spaced outwardly from the latter. Intermediate the inner face of the bottom 4'! of this tubular casing and the bottom 43 of the tubular sleeve there is positioned a washer 46 of leather, or suitable fiber material. At its open or downwardly disposed end the tubular casing has an integral circumferential flange 58 which registers with the uppermost inturned flange 25 on the cylindrical casing I1 and is secured thereto by suitable bolts or screws iii. A gasket 52 is placed intermediate the flange Fail on the tubular casing 49 and the flange 25 on the cylindrical casing ll. Adjacent its top the tubular casing 49 has circumferentially spaced ports r slots 48 therein. When the motor vehicle propelled by the engine is descending a steep grade, the water level will rise above that shown in the drawings. The water W ll flow out- 4 wardly through the ports 48 in the tubular casing 49 and thus cannot enter the lubricating conduits of the pump and flow backwardly through same into the oil pressure lubricating system of the engine.

The vanes 45 on the tubular casing 44 create a partial vacuum in the pumping chamber 24 which induces the heated water to flow from the cylinder head [I through the bore 22 in the attachment flange 26 into the lower or inlet chamber 2! and thence into the pumping chamber; they also force the water from the pumping chamber through the tubular outlet 24 and into the top of the radiator I3.

Having now fully described my invention what I claim as new and useful and desire to secure by Letters Patent of the United States is:

I claim;

1. In a cooling water pump for use on internal combustion engines, comprising a, pump casing, an outlet conduit on said pump casing, a vertically positioned boss having a central bore therein extending upwardly from the bottom of the pump casing, an impeller shaft journalled within the bore of said boss, an impeller casing mounted on the top of said pump casing concentrically positioned with respect to said boss and forming an annular water chamber therewith, an impeller sleeve mounted on the top of the impeller shaft and rotatably positioned within the annular water chamber, and an impeller on the lower end of said impeller sleeve and rotatably positioned within the pump casing.

2. In a cooling water pump for use on internal combustion engines, comprising a pump casing, said pump casing having an inlet opening near its bottom, and an outlet conduit near its top, a vertically positioned boss having a central bore therein extending upwardly from the bottom of the pump casing, an impeller shaft journalled within the bore of said boss, an impeller casing mounted on the top of said pump casing concentrically positioned with respect to said boss and forming an annular water chambertherewith, an impeller sleeve mounted on the top of the impeller shaft and rotatably positioned within the annular water chamber, and an impeller on the lower end of said impeller sleeve and rotatably positioned within the pump casing.

3. In a cooling water pump for use on internal combustion engines, a pump casing having an inlet openin near its bottom, and an outlet conduit near its top, an internal flange formed on the internal wall of the pump casing between the inlet opening and the outlet conduit and dividing the interior of the pump easing into partially separated inlet and outlet chambers, a vertically positioned boss having a central bore therein extending upwardly from the bottom of the casing and through the internal flange on the pump casing, an impeller shaft journalled within the bore of said boss, an impeller casing mounted on the top of said pump concentrically positioned with respect to said boss and forming an annular water chamber therewith, an impeller sleeve mounted on the top of the impeller shaft and rotatably positioned within the annular water chamber, and an impeller on the lowerv end of said impeller sleeve and rotatably positioned in the outlet chamber in the pump casing.

4. In a cooling water pump for use on internal combustion engines, a pump casing having an inlet opening near its bottom, and an outlet conduit near its top, a vertically positioned boss having a central bore therein extending upwardly from the bottom of the pump casing, an impeller shaft extending through the bottom of the pump casing, and journalled within the bore of said boss, a closed cylindrical impeller casing mounted on the top of said pump casing concentrically positioned with respect to said boss and forming an annular water chamber therewith, an impeller sleeve mounted on the top of the impeller shaft and between the top of the boss and the end of the impeller casing, said impeller sleeve being rotatably positioned within the annular water chamber, and an impeller on the lower end of the impeller sleeve and rotatably positioned within the pump casing.

JOSE CASSA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

